September 30, 2005
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits
Gregg Nader
Symptoms:
- Lockup shudder
- TCC cycling
- TCC codes
- Burnt converter
- Harsh downshifts
- Harsh engagement
Cause:
Wear at the TCC control plunger sleeve allows pressure loss that causes TCC problems. Wear at the low brake switch boost sleeve causes harsh downshifts.Correction:
Restore proper TCC or Low brake function by installing Sonnax drop-in TCC control valve/Low brake switch boost valve kit.Warning:
The RE5R05A 3rd and 4th design TCC control plunger valve has a larger diameter (.282") than the valve in this kit. Installing 63741-05K into a 3rd or 4th design application will cause excessive apply pressure, resulting in drivability concerns related to a lack of power and harsh converter apply. Do not install this kit into the TCC control bore of a 3rd or 4th design casting!
JR710E, JR711E, JR712E, RE5R05A, RE7R01A
TCC Control Valve Kit/Low Brake Switch Boost Valve Kit
Part No. 63741-05K
RE5R05A: TCC control valve kit (1st and 2nd design casting only)
RE7R01A, JR710E, JR711E, JR712E: Low brake switch boost valve kit
Also fits TCC control bore in Hyundai/Kia A5SR1 and Subaru 5EAT.
You need this if...
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Vehicles equipped with 1st and 2nd design Jatco/Nissan RE5R05A valve bodies may have TCC concerns such as lockup shudder, premature or bumpy apply, slippage and/or a burnt converter. These issues can be caused by wear in the TCC control sleeve which allows apply pressure leakage.
Vehicles equipped with Jatco/Nissan RE7R01A, JR710E, JR711E and JR712E transmissions may display harsh downshifts caused by wear and leakage in the Low brake switch boost sleeve. All above issues can be solved by installing Sonnax TCC control valve kit/Low brake switch boost valve kit 63741-05K into the appropriate bore.
- Sleeve is manufactured from highly wear-resistant aluminum alloy
- Hardcoat anodized aluminum valve combats premature wear
- Drop-in Zip Valve™ parts install quickly and easily
- Valve
- Sleeve .239" Dia.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Jatco/Nissan RE5R05A Valve Body Layout
October 08, 2015
Missed It by "That Much"
You need this if...
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.
